From aa7cb11056d2b40ad308b35d0cff77b40ecdf6df Mon Sep 17 00:00:00 2001
From: Bruno Raoult <braoult@gmail.com>
Date: Sat, 1 Jul 2023 20:56:26 +0200
Subject: [PATCH] add FILE* output

---
 include/debug.h | 23 ++++++++++++++---------
 libsrc/debug.c  | 29 ++++++++++++++++++-----------
 src/chessdefs.h |  3 +++
 src/eval.c      |  4 +++-
 src/fen.c       |  2 +-
 src/piece.c     |  2 +-
 6 files changed, 40 insertions(+), 23 deletions(-)

diff --git a/include/debug.h b/include/debug.h
index 3619f24..785d0ef 100644
--- a/include/debug.h
+++ b/include/debug.h
@@ -14,29 +14,34 @@
 #ifndef DEBUG_H
 #define DEBUG_H
 
+#include <stdio.h>
 #include <stdbool.h>
 #include <stdint.h>
 
+#include <br.h>
 #include <bits.h>
 
-#define _unused __attribute__((__unused__))
 #define _printf __attribute__ ((format (printf, 6, 7)))
 
 #ifdef DEBUG_DEBUG
-void debug_init(u32 level);
+
+void debug_init(u32 level, FILE *stream);
 void debug_level_set(u32 level);
-u32  debug_level_get(void);
+void debug_stream_set(FILE *stream);
 void _printf debug(u32 level, bool timestamp,
                    u32 indent, const char *src,
                    u32 line, const char *fmt, ...);
 #else  /* DEBUG_DEBUG */
-static inline void debug_init(_unused u32 level) {}
-static inline void debug_level_set(_unused u32 level) {}
-static inline void _printf debug(_unused u32 level, _unused bool timestamp,
-                                 _unused u32 indent, _unused const char *src,
-                                 _unused u32 line, _unused const char *fmt, ...) {}
+
+static inline void debug_init(__unused u32 level, __unused FILE *stream) {}
+static inline void debug_level_set(__unused u32 level) {}
+static inline void debug_stream_set(__unused FILE *stream) {}
+static inline void _printf debug(__unused u32 level, __unused bool timestamp,
+                                 __unused u32 indent, __unused const char *src,
+                                 __unused u32 line, __unused const char *fmt, ...) {}
+
 #endif  /* DEBUG_DEBUG */
-#undef _unused
+
 #undef _printf
 
 /**
diff --git a/libsrc/debug.c b/libsrc/debug.c
index ac1d2a6..c6e5974 100644
--- a/libsrc/debug.c
+++ b/libsrc/debug.c
@@ -26,19 +26,26 @@
 #define MILLISEC 1000000                          /* milli sec in sec */
 
 static long long timer_start;                     /* in nanosecond */
-static u32 debug_level=0;
+static u32 debug_level = 0;
+static FILE *stream = NULL;
 
 void debug_level_set(u32 level)
 {
     debug_level = level;
-
-    log(1, "debug level set to %u\n", level);
+    log(0, "debug level set to %u\n", level);
 }
 
-void debug_init(u32 level)
+void debug_stream_set(FILE *_stream)
+{
+    stream = _stream;
+    log(0, "stream set to %d\n", stream? fileno(stream): -1);
+}
+
+void debug_init(u32 level, FILE *_stream)
 {
     struct timespec timer;
 
+    debug_stream_set(_stream);
     debug_level_set(level);
     if (!clock_gettime(CLOCK_MONOTONIC, &timer)) {
         timer_start = timer.tv_sec * NANOSEC + timer.tv_nsec;
@@ -66,28 +73,28 @@ inline static long long timer_elapsed()
 void debug(u32 level, bool timestamp, u32 indent, const char *src,
            u32 line, const char *fmt, ...)
 {
-    if (level > debug_level)
+    if (!stream || level > debug_level)
         return;
 
     va_list ap;
 
     if (indent)
-        printf("%*s", 2*(indent-1), "");
+        fprintf(stream, "%*s", 2*(indent-1), "");
 
     if (timestamp) {
         long long diff = timer_elapsed();
-        printf("%lld.%03lld ", diff/NANOSEC, (diff/1000000)%1000);
-        printf("%010lld ", diff);
+        fprintf(stream, "%lld.%03lld ", diff/NANOSEC, (diff/1000000)%1000);
+        fprintf(stream, "%010lld ", diff);
     }
 
     if (src) {
         if (line)
-            printf("[%s:%u] ", src, line);
+            fprintf(stream, "[%s:%u] ", src, line);
         else
-            printf("[%s] ", src);
+            fprintf(stream, "[%s] ", src);
     }
     va_start(ap, fmt);
-    vprintf(fmt, ap);
+    vfprintf(stream, fmt, ap);
     va_end(ap);
 }
 
diff --git a/src/chessdefs.h b/src/chessdefs.h
index b266286..f98f7be 100644
--- a/src/chessdefs.h
+++ b/src/chessdefs.h
@@ -17,6 +17,9 @@
 #include <bits.h>
 
 /* piece_t bits structure
+ * MSB 8 7 6 5 4 3 2 1 LSB
+ * 1: color (0 for white)
+ * 2-7: bit set for pawn (2), knight, bishop, rook, queen, king (7)
  */
 typedef u8 piece_t;
 
diff --git a/src/eval.c b/src/eval.c
index de26eb5..1391c74 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -98,7 +98,8 @@ int main(int ac, char**av)
     pos_t *pos;
     eval_t res;
 
-    debug_init(5);
+    debug_init(5, stderr);
+
     piece_pool_init();
     moves_pool_init();
     pos_pool_init();
@@ -118,6 +119,7 @@ int main(int ac, char**av)
     //pos_print(pos);
     //pos_pieces_print(pos);
     moves_gen(pos, pos->turn, true);
+    pos_print(pos);
     moves_print(pos, M_PR_SEPARATE);
     res = eval(pos);
     printf("eval=%d centipawns)\n", res);
diff --git a/src/fen.c b/src/fen.c
index f2cdbd9..a7b4fd0 100644
--- a/src/fen.c
+++ b/src/fen.c
@@ -179,7 +179,7 @@ int main(int ac, char**av)
 {
     pos_t *pos;
 
-    debug_init(5);
+    debug_init(5, stderr);
     piece_pool_init();
     pos_pool_init();
     pos = pos_get();
diff --git a/src/piece.c b/src/piece.c
index d257f81..5b3dc19 100644
--- a/src/piece.c
+++ b/src/piece.c
@@ -119,7 +119,7 @@ int main(int ac, char**av)
 {
     pos_t *pos;
     printf("zobi\n");fflush(stdout);
-    debug_level_set(6);
+    debug_init(6, stderr);
     log_f(5, "kfsjdhg\n");
     pos_pool_init();
     pos = pos_get();